Descriptions - Schaaf 1-6, Sec. 6, T129N, R103W, Bowman Co., ND, Red River B Zone
Reported Core Interval 9275-9303
Adjusted Core Interval 9270-9298
9275-9278 -Gray slightly skeletal lime mudstone. Skeletal fragments are small crinoids, brachiopods, and bryozoans. Stylolites are common and there is no visible porosity or oil staining.
9278-9280 -Brown laminated lime mudstone and dolomudstone to doloboundstone. Laminations are cryptalgal.
9280-9282 - Gray anhydrite with bedded and enterolithic structures common. Near the base of the unit, gray and light brown, porous dolomudstone interbeds are common. There is no oil staining.
9282-9289 -Brown lime mudstone, dolomudstone, and doloboundstone. In the upper portion of the unit, algal laminations and stromatolitic structures are common. At the base of the unit, sparse anhydrite occludes porosity.
9290-9303 -Brown to dark gray, burrowed and nodular bedded lime mudstone to lime wackestone. Skeletal fragments are dominantly small crinoids with lesser numbers of brachiopods and solitary corals. Stylolitization is common within this unit.